Note 4 - Net Earnings Per Share - Earnings Per Common Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income (loss) attributable to Air T, Inc. Stockholders	$ 421,701	$ 1,084,102	$ 1,390,090	$ (4,667,369)
Earnings (Loss) Per Share:
Basic (in dollars per share)	$ 0.21	$ 0.53	$ 0.68	$ (2.11)
Diluted (in dollars per share)	$ 0.21	$ 0.53	$ 0.68	$ (2.11)
Weighted Average Shares Outstanding:
Basic (in shares)	2,042,789	2,042,789	2,042,789	2,207,658
Diluted (in shares)	2,046,945	2,047,976	2,047,305	2,207,658